Question

Electric field and current density have relation

• A. $E\propto J$
• B. $E\propto J^2$
• C. $E\propto \frac{1}{j^2}$
• D. $E^2\propto \frac{1}{j}$

Answer 1

Answer: (A)

Current density relates with electric field as
$J=\sigma E=\frac{E}{p}i$
where $\sigma$ =conductivity and p= resistivity or specific resistance of substance.